Improvement in hot-air deflectors



M. T. FORSYTH, Sr.

now-AIR nEFLEcTon.

No, 172,108. Patentea Jan.11`,"1a7e.

NAPETERS. PHOTO-LITHUGRAPHER, WASHINGTON. Dv C.

Y building by causing it to be delivered in a di- UNITED STATES PATENT OFFICE MANUEL T. FORSYTH, SR., OF BALTIMORE, MARYLAND.

IMPROVEMENT lN HOT-AIR DgEFLECTORS.

Specification forming part of Letters Patent No. 172,108, dated January 11, 1876; application filed October 28, 1875.

To all rwhom it may concern:

Be it known that I, MANUEL T. FoEsYTH, Sr., of the city ofV Baltimore and State of Maryland, have invented certain new and useful Improvements in Hot-Air' Detlectors, of which the following` is a specification and I do hereby declare that in the same is con tained a full, clear, and exact description of my said invention, reference heilig hadto the accompanying drawing, and to the letters of reference marked thereon.

My invention lrelates to a portable deliector, adapted to be placed upon registers or pipes, constructed to deliver heated air to the various apartments in buildings, to change the direction of the incoming current of hot air in order to increase its effectiveness, as hereinafter described.

It is Well known that heated air, in issuing from registers in the floors ot' buildings, ascends in a nearly vertical direction, and with a velocity governed by the relative tempera tures of the said heated air and the atmosphere through which it passes. Atmospheric air being a poor conductor of heat, the warming of buildings depends principally upon a mechanical mixing' of the heated air with the surrounding atmosphere, which mixing` is not attained when the upward current of rarefied. air is undisturbed. The usual effect ofthe transmission of heated air to large apartments bymeans of registers in the door is an uncomfortably high temperature in the upper part of the building, while the lower part re mains comparatively cold.

The object of the present inrention is the diffusion ofthe heatedair furnished to the rection nearly parallel to the door, and, by mixing it with the cooler air near to the door, to prevent its rapid'ascent toward the ceiling. In the description of my invention which follows, due reference must be had to the aci companying drawing forming a part of this specification, and in which- Figure 1 is a sectional view of the invention. showing its application to a register. Fig. 2

is an exterior side view of the invention', with the door at the end thereof open, and Fig. 3 a plan of the deflector.

Similar letters of reference indicate similar parts of the invention in all the views.

A is a box, one end of which is open, and the other provided with a hinged door, a, which maybe either thrown down, so as to close one end ofthe box, or be folded back, as is shown in Fig. 2. Bis a plate secured to the inside of the box A, and bent in such manner as to deect the heated air issuing from the register C toward the floor, and thus partially counteract the tendency` of the air to rise after leaving the box.

The deector is placed upon the register with its open end in the direction to which it is desired to force the heated air. When two or more deiiectors are used their positions are arranged to conduct the hot air in different directions, so as to prevent the currents com! ing into contact with each other. By this means theentire stratum of air near to the door of the building is rst mixed with the heated air, and as the air. thus warmed by the mixing, ascends the whole body of air in the room is warmed.

Actual experiment has proved that large rooms may be heated to vnearly a uniform temperature in every part thereof by means of my invention with much less coal than would be consumed to make the air in the lowerparts ofthe building at the same temperature 'in the usual way, as in the latter case the heated air ascends directly from the register to the ceiling.

It will be seen that by means of the door a the hot air can be delivered either from one or both ends of the dellector, as may be desired.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent of the United States, is

A portable hot-air detlector formed of the box A, in combination with the plate B, and

door c, substantially as and for the purposel set forth.

In testimony whereof I have hereunto suhseribedmy name this 19th day of October, in the year of our Lord, 1875. f

W. W. WHAEToN, S. C. TALL. 

